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Metropolitan Area of BarcelonaEnvironmental Authority
Niza 7th 2009
The Baix Llobregat regeneration Plant
Pedro Aguiló [email protected]
Plant Manager Baix LlobregatEMSSA
Martín Gullón [email protected]
Director of Water Services MAB-EMA
Contents
• Introduction to EMA-MAB• Waste water regeneration in Barcelona
• Baix Llobregat waste and regeneration treatment plant
• Main characteristics• Quality and necessities of regenerated water• Decantation + micro filtration + disinfection (DMD)• DMD + EDR • DMD + Ultra filtration + Reverse Osmosis
• Conclusions
Metropolitan Area of Barcelona Environmental
Authority (EMA-MAB)
• A local authority created under the Catalan Law 7/1987 of 4 April, which carries out specific public actions in the Barcelona conurbation
• 33 municipalities
• Surface area: 585.4 km2
• Inhabitants: 3,126,294 (2007)
• Population density: 5,340 inhab/km2 (> 15,000 city of Barcelona)
...Introduction to EMA-MAB (Metropolitan Area of Barcelona Environmental Authority)
• Foundation, government and administration• The Law 7/1987 of 4 April
establishes and regulates specific public actions in the Barcelona conurbation and the districts within its sphere of influence
• Government and administration of the organization is performed by the Metropolitan Council, a public body which consists of mayors and representatives of all the municipalities (11 representatives from Barcelona, 3 from municipalities of >100,000 inhab. and 1 each from the remainder)
...Introduction to EMA-MAB (Metropolitan Area of Barcelona Environmental Authority)
Matters under jurisdiction of EMA-MBA
• Treatment of solid municipal waste is made by EMA-MBA and through concessions with private companies
• Supply of drinking water is provided by specialized companies
• Water transport through large pipelines and wastewater treatment are carried out by EMSSA, a public corporation
...Introduction to EMA-MAB (Metropolitan Area of Barcelona Environmental Authority)
Waste water treatment and transport in Metropolitan Area of Barcelona
• 1.200.000 m3/d(55% Catalunya)
• 6 millions eq-hab
...Introduction to EMA-MBA (Environmental Authority of the Metropolitan Area of Barcelona)
Besòs
Montcada
El Prat
Gavà
St Feliu
Begues
Vallvidrera
• More than 250 km of waste water sewers• 29 waste water pumping stations• 1 pipe line for sludge (5% water content) 8 km length• 7 waste water treatment plants and 3 marine outfalls
• Solid waste production:1,633,284 Tons
• Drinking water billed: 190 millions m3
• Volume of wastewater treated:280 millions m3
• 2009 Budget:€ 249 million
• Staff: 100 people
• Basic data for 2008
...Introduction to EMA-MAB (Metropolitan Area of Barcelona Environmental Authority)
The Reuse in the Metropolitan Area of Barcelona
Gavá-ViladecansPlant
Hydraulic Restitution
Agricultural Irrigation
Agricultural Irrigation
Agricultural Irrigation
Environmental Use in the River
Reuse Systems in the Metropolitan Area of Barcelona
St Feliu de Llobregat Plant
Wetlands
Montcada Plant
Environmental Use in the River
Baix Llobregat Plant
Barrier against Saline IntrusionDistribution Net (industrial, green areas...)
Tankers
Refilling Aquifer Delta Llobregat
...The Reuse in the MABFlow of treated and regenerated water in m3/year, from 2004 to
September 2008 Sewage treatment plant
Year 2004 Year 2005 Year 2006 Year 2007 Year 2008
Use /End
Gavà-Viladecans 11.260.765 4.055.000
9.977.770 4.585.000
9.790.802 4.747.000
10.684.599 3.843.000
11.581.7073.450.000
Pond of La Murtra and sea Slides of the Delta
Begues 334.705 0
306.600 0
319.209 0
330.503 0
383.9880
Stream of Begues Green areas (*)
Montcada i R. 20.422.945 1.000.000
17.830.350 1.000.000
19.105.941 1.000.000
18.333.285 1.000.000
17.875.535 1.000.000
Besós River Wetlands in Besós
Sant Feliu de Ll. 21.950.390 200.000
18.940.092 618.798
19.424.203 0
17.831.294 5.420
16.733.739 69.126
Side Channel A-2 road and river Agricultural irrigation channels
Vallvidrera 259.880 235.060 245.813 260.587 226.354 Stream of Vallvidrera Besòs 138.702.555 134.687.920 131.020.000 124.498.000 131.284.000 Mediterranean Sea Llobregat 104.755.730
0
0
0
0
0
0
107.959.700 0
0
0
0
0
0
99.773.683 0
1.500.000
3.000.000
0
0
0
84.417.300 134.454
2.017.927
12.941.461
0
0
0
68.906.063 473.798
2.970.965
22.799.777
2.386.985
0
3.681
Mediterranean Sea Barrier against Saline intrusion
Wetlands Llobregat river Agricultural irrigation Industrial Other uses
REUSED 5.255.000 6.203.798 10.247.000 19.942.262 33.154.332 NOT REUSED 297.686.970 289.937.492 279.679.651 256.355.568 246.991.386 TOTAL 302.941.970 296.141.290 289.926.651 276.297.830 280.145.718 (*) Still under study
The Baix Llobregat Plant
Biological Treatment with N/P reduction
Marine Outfall to the Mediterranean
Regeneration Plant with different quality outflow
Treatment and Dryingof sludge with
associated Cogeneration
• Demand for Regenerated Water
• Total Design Flow: 3,25 m3/s
• Expected Annual Demand: > 50 hm3/year(seasonal demand )
...The Baix Llobregat Plant
River Maintenance: 1,50 130.000Recharge Ponds , Aquifer: 0,50 43.000Agricultural Irrigation: 0,75 65.000Wetlands: 0,40 35.000Barrier against Saline Intrusion : 0,17 15.000Green Areas, Hosing Down of streets ... 0,025 2.000Industrial: 0,08 7.000
m3/s m3/d
AGRICULTURAL IRRIGATION AREASAGRICULTURAL IRRIGATION AREAS
INDUSTRIAL
BARRIER AGAINST SALINE INTRUSIONBARRIER AGAINST SALINE INTRUSION
GREEN AREAS
Demand for Regenerated Water
FLOW MAINTENANCE IN THE LLOBREGAT RIVER
RECHARGE PONDS OF THE AQUIFER IN DELTA DE LLOBREGAT
WETLANDS IRRIGATION IN DELTA DEL LLOBREGAT
• Qualities of regenerated Water
• Quality 1 : River maintenanceRecharge pond of the aquiferWetlandsGreen AreasHosing down of streets Sewers cleaningIndustries
• Quality 2 : Agricultural Irrigation
• Quality 3 : Barrier against Saline Intrusion
...The Baix Llobregat Plant
DMD +Ultra filtrationand Reverse
Osmosis
DMD + EDR
Decantation ,Micro filtration10 um andDisinfection(UV and sodium
hypochlorite)
Physical-Chemical
Micro filtrationUV Disinfection
and sodium hypochlorite
...The Baix Llobregat Plant
• Regeneration Plant
REUSE PIPES
PIPE FOR RIVER MAINTENANCE (1,5 m3/s) AND RECHARGE POND OF THE AQUIFER(0,5 m3/s)
PIPE FOR WETLANDS (0,4 m3/s)
PIPE FOR GREEN AREAS (0,025 m3/s) AND INDUSTRIES (0,08 m3/s)
PIPES FOR THE BARRIER AGAINST SALINE INTRUSION(15.000 m3/d)
PIPES FOR AGRICULTURAL IRRIGATION (0,75 m3/s)
Filling stationfor tankers
EDR
POND
Reuse at Baix Llobregat WWTP
• Applied Technologies:– Actiflo® Process:
• Characteristics• Components
– Hydrotech Process:• Characteristics
Reuse at Baix Llobregat WWTP. ACTIdisk
ACTIFLO®
HYDROTECH
• ACTIFLO® (3 x 4.800 m3/h):• Max. recirculation: 6 x 110 m 3/h• Hydraulic load in settler: 120 m/h
• HYDROTECH (2 x 5 lines, 10 unit.) :• Mesh size: 10 µµµµm.• Number of discs: 18 disc/unit.• Unitary filter area: 100,8 m 2
• Back-washing pump: 8,4 l/s/unit.
• Final solution: ACTIDisk
Desinfección UV . . .
Filtración
Decantación lamelar
Maduración
Inyección
Coagulación
Decantación secundaria
Injection
Coagulation
Secondary Settler
Maturation
Lamella clarifier
Filtration
U.V. Disinfection
First Results
Av. raw w ater Max. Outlet Av. Outlet Min. Outlet Removal (%)
pH 7,73 8,21 8,01 7,52 -
Turbidity (NTU) 34,7 2,37 1,29 0,83 96,3
SST (mg/l) 67 4,0 2,6 2,0 96,2
TP (mg /l) 3,41 1,66 0,90 0,33 73,5
COD (mg/l) 107 81 41 18 61,1
BOD5 (mg/l) 23 8 3 1 86,7
• Four channels of UV, with 400 lamps each make the disinfection of regenerated water
• Additionally, between 2 and 4 ppm of hypochlorite are dosed to guarantee the disinfection during the transport of water
...The Baix Llobregat Plant
• Disinfection (UV + sodium hypochlorite)
Desinfección UV . . .
Filtración
Decantación lamelar
Maduración
Inyección
Coagulación
Decantación secundaria
Injection
Coagulation
Secondary Settler
Maturation
Lamella clarifier
Filtration
U.V. Disinfection
PIPES OF REUSE OF QUALITY 1
INDUSTRIAL (possible additional treatment in the specif ic industry)
GREEN AREAS, STREET CLEANING AND SEWER SYSTEM
MAINTENANCE LLOBREGAT RIVER
RECHARGE POND OF AQUIFER DELTA LLOBREGAT
WETLANDS IRRIGATIONRIEGO DELTA LLOBREGAT
EXPECTED USES
Hidrante
Characteristics of the inlet of WWTP
SS >250 mg/L
BOD > 280 mg/L
N > 60 mg/L
P > 5 mg/L
The outlet of the WWTP, fulfils the quality Standard 91/271.
SS < 35 mg/L
BOD < 25 mg/L
QOD < 125 mg/L
N< 10 mg/L
P < 2 mg/L
After regeneration, water fulfils the Royal Decree RD1620 of reuse for agricultural and environmental uses.(Annex 1, qualities 2.1 , 2.2, 2.3)
< 10 NTU
SS < 20 mg/L
E.c. < 100ufc/100mL
Helminth eggs < 1/10 L
After reverse Osmosis water fulfils the Royal Decree RD1620 of reuse for direct injection/drive to the aquifer .(Anex 1 quality 5.2)
< 2 NTU
SS < 10 mg/L
N < 10 mg/L
E.c < 0 ufc/100mL
Helminth eggs < 1/10 L
...The Baix Llobregat Plant• Qualities of Water
• The maximum regeneration flow in the Baix Llobregat plant is 320.000 m3/day
• The regeneration process made up to this moment, wh ich fulfils the qualities specified in the Royal Decree RD1620/2007 , is used for the following ends:
• Re-establishment of the Llobregat River flow• Agricultural irrigation• Stabilization of wetlands of ecological/environment al interest• Avoidance of salt water intrusion in the aquifer of Delta del Llobregat
• From its starting, in June 2007, to December 2008, an amount of 43 hm3 of water has been regenerated, out of the total of 145 hm3
treated by EDAR, which means 28 %. Its distribution has been:
• 35,5 hm3 (82%) To re-establish the Llobregat River flow• 2,4 hm3 (6%) For agricultural irrigation• 4,8 hm3 (11%) To stabilize the wetlands of ecolog ical interest• 0,4 hm3 (1%) To avoid salt water intrusion in t he aquifer
Conclusions